Helical scan tape guide apparatus
US4763210A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 2, 1987 |
| Grant date | Aug 9, 1988 |
| Priority date | — |
| Expiry date | Apr 2, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B15/6656
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Helical scan tape recorder/playback apparatus includes a pair of concave air-bearing surfaces disposed immediately adjacent and tangential to opposing sides of a circumferential surface of a rotary head scanner, to cooperatively form a path for guiding magnetic tape past the head scanner at a predetermined angle other than zero degrees. A vacuum source serves to evacuate air from the vicinity of each air-bearing surface to create an air pressure gradient the effect of which is to cause magnetic tape to ride on a thin film of air interposed between the tape and each air-bearing surface during transport of the tape from a supply reel to a take-up reel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.